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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 526 · 40 questions
TalentJR

The fast method (Double up): × 4: double, then double again. × 8: double three times. To double a big number, double the tens and the ones separately and add: double 37 = 60 + 14 = 74.

NameDateTime takenScore ___ / 40
  1. 1.17 × 8 =
  2. 2.44 × 8 =
  3. 3.69 × 8 =
  4. 4.20 × 8 =
  5. 5.48 × 8 =
  6. 6.31 × 8 =
  7. 7.64 × 4 =
  8. 8.41 × 4 =
  9. 9.64 × 8 =
  10. 10.58 × 8 =
  11. 11.17 × 8 =
  12. 12.53 × 4 =
  13. 13.75 × 4 =
  14. 14.26 × 8 =
  15. 15.18 × 8 =
  16. 16.153 × 4 =
  17. 17.41 × 8 =
  18. 18.42 × 4 =
  19. 19.119 × 4 =
  20. 20.68 × 8 =
  21. 21.39 × 8 =
  22. 22.56 × 4 =
  23. 23.148 × 4 =
  24. 24.78 × 4 =
  25. 25.145 × 4 =
  26. 26.56 × 4 =
  27. 27.103 × 4 =
  28. 28.19 × 8 =
  29. 29.94 × 4 =
  30. 30.51 × 4 =
  31. 31.27 × 8 =
  32. 32.91 × 4 =
  33. 33.158 × 4 =
  34. 34.51 × 8 =
  35. 35.75 × 8 =
  36. 36.69 × 8 =
  37. 37.20 × 8 =
  38. 38.74 × 8 =
  39. 39.46 × 8 =
  40. 40.24 × 8 =

Answer key

  1. 136
  2. 352
  3. 552
  4. 160
  5. 384
  6. 248
  7. 256
  8. 164
  9. 512
  10. 464
  11. 136
  12. 212
  13. 300
  14. 208
  15. 144
  16. 612
  17. 328
  18. 168
  19. 476
  20. 544
  21. 312
  22. 224
  23. 592
  24. 312
  25. 580
  26. 224
  27. 412
  28. 152
  29. 376
  30. 204
  31. 216
  32. 364
  33. 632
  34. 408
  35. 600
  36. 552
  37. 160
  38. 592
  39. 368
  40. 192

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